A design approach for a dual-polarized, dual-band-reject frequency selective surface using a new Fractal element

In this paper we propose a novel frequency selective surface (FSS) as a band-reject filter for microwave frequencies. Here we suggest an innovative Fractal geometry named as FSS with Sierpinski fractal tripole elements (SFTE-FSS). The structure is analyzed with Ansoft Designer software package using the Method of Moment (MoM) technique. Then we compare the performance of the structure with that of Sierpinski dipole FSS. After all we perform a parametric study on SFTE-FSS. Using the information obtained by parametric study, we optimize the structure. The results show an interesting dual-polarized, dual-band behavior of the filter response. Finally, we bring experimental results and compare them with simulation results to verify the design process.